Ni-free high-entropy rock salt oxides with Li superionic conductivity

Abstract

High entropy oxides with rock salt structure represent an attractive class of materials with intriguing functional properties. Nevertheless, some elements in their composition represent a relevant threat to human health...

Porous High-Entropy Oxide Anode Materials for Li-Ion Batteries: Preparation, Characterization, and Applications

“…Since the first high-entropy oxide was developed in 2015 [19], HEOs with different crystal structures have been developed, including rock salt [26,47], spinel [48], perovskite [49], fluorite [50,51], and layered O3-type [52,53]. There is a great variety of crystal struc-…”

“…Since the first high-entropy oxide was developed in 2015 [19], HEOs with different crystal structures have been developed, including rock salt [26,47], spinel [48], perovskite [49], fluorite [50,51], and layered O3-type [52,53]. There is a great variety of crystal structures and there are the thousands of ways of combining the elements that enrich the field of application of HEOs (thermoelectric applications, electrochemical energy storage and catalysis, etc.).…”

Recent progress and perspectives on cation disordered rock-salt material for advanced Li-ion batteries

“…Some studies in recent years have begun to focus on the development of new synthesis/sintering routes for high-entropy oxides (HEO) with rock-salt structures. [120][121][122][123][124] Table 3 shows part of the application of high-entropy materials in the cathode materials of Liion batteries in recent years.…”

Enhanced Mechanical and Electromechanical Properties of Compositionally Complex Zirconia Zr1–x(Gd1/5Pr1/5Nd1/5Sm1/5Y1/5)xO2−δ Ceramics

“…Compared to binary or doped oxides, improved properties, such as high ionic conductivity, low thermal conductivity, colossal dielectric constant, and improved thermoelectric figure of merit, are often reported in the literature. 11,13,14 Fluorite oxide is an imperative type of structural/functional ceramics material. It has a plethora of technical applications, including solid-state ionic conductors, thermal barrier coatings, gas sensors, oxygen storage capacitors, biomarkers, memristors, and catalysts.…”

“…Following this seminal work, the realm of HEOs was explored in different oxide systems, including fluorites, spinels, perovskites, rutiles, pyrochlores, and beyond. Compared to binary or doped oxides, improved properties, such as high ionic conductivity, low thermal conductivity, colossal dielectric constant, and improved thermoelectric figure of merit, are often reported in the literature. ,, …”